15 best JavaScript code compression tools – Updated 2019

JavaScript code compression is the process of removing all unnecessary characters from the source code without changing its functionality. These unnecessary characters usually include space characters, newline characters, comments, and block delimiters to increase the readability of the code, but do not need it to execute.

In this article, we have selected 15 of the best JavaScript compression tools, including simple online converters, GUI tools, and command line interfaces.

1. JavaScript Minifier

It is a great tool with an API to narrow down the js code.

2. JSMIni

If you want to quickly and easily reduce JavaScript or jQuery files, use jsMini. Just copy and paste the source code, choose whether to base or fully compress, and then shrink the code.

3. JSCompress

JSCompress.com is an online javascript compressor that allows you to compress and shrink javascript files. Compressed javascript files are ideal for production environments because they typically reduce file size by 30-90%. Most file size reductions are achieved by removing comments and extra whitespace characters that are not required by the web browser or visitors.

4. Minifier

A simple tool that simplifies CSS/JS without big settings. It re-workes the URL in the CSS from its original location to the output location. It will automatically parse the @import statement in CSS.

5. Gulp.js

Js is a stream building system. It uses stream and code pair configuration to make a simpler and more intuitive build. By preferting code rather than configuration, GUMP makes simple things simple and makes complex tasks easy to manage. By leveraging the power of node streams, you get a fast build that doesn't write intermediate files to disk. GUP's strict plugin guide ensures that plugins are kept simple and work the way you expect.

6. Uglifyjs

This package implements a generic JavaScript parser/compressor/beautification toolkit. It was developed on NodeJS, but it should work on any JavaScript platform that supports the CommonJS module system (if the platform you choose doesn't support CommonJS, you can implement it easily or give up the export.

7. Grunt

Grunt is a task-based command line build tool for JavaScript projects. It has the following predefined tasks that you can use in your project: connecting files, validating files with JSHint, executing minify files with UGIFIFYJS, running unit tests with node units, and more.

8. Koala

Koala is a GUI application for Less, Sass, Compass, and CoffeeScript compilation to help web developers use them more effectively. Koalas can run on Windows, Linux and Mac.

9. Prepros

PreProfessional is a tool for compiling fewer tools, Sass, Compass, Stylus, Jade and more with an automatic CSS prefix with built-in server for cross-browser testing. It runs on Windows, Mac and Linux.

10. Ajax Minifier

This tool is a Windows application that allows you to run Microsoft AjaxMinifier without using the command line or Visual Studio. It shrinks all javascript files in folders and nested folders, shrinks a single javascript file, enables/disables super-compression and analysis options for small programs, and more.

11. Smaller

Smaller is a powerful HTML, CSS and JavaScript compressor on OSX, which also has the ability to combine multiple files into one. Compress your files and make your site load faster.

12. Ultra Minifier

Ultra Mini is the simplest YUI Compressor GUI to shrink Javascript and CSS code without using a terminal.

13. Require JS

RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments like Rhino and Node. Using a modular script loader like RequireJS will increase the speed and quality of your code. It includes an optimization tool that can be run as part of the packaging step to deploy code. Optimization tools can combine and shrink JavaScript files for better performance.

14. Online JavaScript/CSS Compressor

This is a web interface for compressing JavaScript or CSS. The tool uses UgulifyJS 2, Clean-CSS and HTML abbreviations.

15. Minify

Minify is a PHP 5 application that helps you follow Yahoo's high-performance website rules, which combine multiple css or Javascript files, remove unnecessary whitespace and comments, and provide gzip encoding and best customers for them. End cache header.